(315 ILCS 5/12) (from Ch. 67 1/2, par. 74)
    Sec. 12. In making investigations herein authorized the Commission may hold public hearings. Any hearing may be conducted by the Commission or by a committee appointed by it, consisting of one or more members of the Commission, or by an employee or agent specially authorized by the Commission to conduct it. The Commission and any member, employee or agent thereof so designated shall have power to administer oaths, take affidavits, subpoena and require the attendance and testimony of witnesses and the production of books and papers pertaining to such investigation.
    In case of contumacy or refusal to obey a subpoena issued to any person, the circuit court of the county in which such person resides or has his principal place of business, upon application by the Commission, shall have jurisdiction to issue to such person an order requiring such person to appear before the Commission or before any member, employee or agent thereof designated to conduct such hearing there to produce evidence, if so desired, or there to give testimony touching the matter under investigation and any failure to obey such order of the court may be punished by said court as a contempt thereof.
    The officials of any city, village or town and the members of any zoning commission shall, when requested so to do by any member of the Commission, make available for inspection by the Commission or by any committee, employee or agent of the Commission, any and all records and data which they may have pertaining to an area which is then being investigated.
(Source: Laws 1965, p. 3552.)